Its material is fine stainless steel.This item is made entirely by hand .No chrome plating and No nickel plating. Just  hand-polished.

Size: Length about: 63mm

effective length about: 55mm

The Maximum diameter of parts (tail) :10mm

The diameter of the middle part : 8 mm

The diameter of the front entrance:From 8 MM down to 6 MM(Cone)

Through-hole diameter about:4 mm.

This is a perfect size.

Shipment
-All order are free shipping to every buyer.
-We will ship the items to your AliExpress confirmed address， if you do not inform us the address where we should ship to， we are not responsible for wrong or undeliverable address.
-The items are only shipped after receipt of your full payment， and a phone number is important when you leave your address.
-In general， we use China Post AIR Mail to ship.
If your order exceeds US$100， we will use DHL， UPS and FedEx to ship.
In a word， we will select the fast and reliable way for delivery.
Delivery Time
- China Post AIR Maill: Generally 10-30 working days.
- UPS，DHL，FEDEX:3~5 business days which depend on the country delivered to.
Dear customers， Pleas note:
-We are not responsible for any custom duty or import tax ，these charges are not included in the item price and shipping cost.
-Please check your country's customs office to determine what these additional costs will be prior to bidding/buying.
-We're not responsible for any accident， delays or other issues during delivery.
-We normally mark your item as "Metal Crafts".
Warranty & Return Policy
-Usually the items not defective， they are 100% brand new and we check them carefully before shipping. -Please send back the defective items within 3 days after having received them， we will send you new ones， but you have to pay the shipping cost， or Refund will be given as money back.
-The warranty does not include: accident， human fault or improper use.
Feedback
-Dear customers， we appreciate your kind co-operation with us， if you are satisfied with our items and service， please leave us a positive feedback.
-Please e-mail us or telephone us before leaving any negative or neutral feedback， we will solve any problems satisfactorily.
-Your positive feedback will be highly appreciated. Hope we can build good &long-term business relationship with you， thank you!