Material: high quality foam
Specifications：
No. 1 foam collar， width: 1.5 cm， adjustment range: 30-37cm， recommended the use of 1-4kg
No. 2 foam collar， width: 2 cm， adjustment range: 35-45cm， recommended the use of 3-7.5kg
No. 3 foam collar， width: 2.5 cm， adjustment range: 38-52cm， recommended the use of 5-15kg
No. 4 foam collar， width: 3 cm， adjustment range: 46-56cm， recommended the use of 12.5-35kg
No. 5 foam collar， width: 4 cm， adjustment range: 55-65cm， recommended the use of 25-50kg
Note: manual measurement error 1-5 cm or so hope Pro understanding! Be sure to mark the recommended size to choose Oh ~ ~ ~




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