Product information:

Adjustable finger force device material: PP+TPR+spring
Finger grip ring material: silicone
Multifunctional 8-hole finger trainer: TPE

Four-piece set A: Eight-hole finger power device*1, adjustable finger power device*1, 20-pound finger grip ring*1, 45 hollow ball 200g*2
Four-piece set B: Eight-hole finger power device*1, adjustable finger power device*1, 30-pound finger grip ring*1, 48 hollow ball 270g*2
Four-piece set C: Eight-hole finger power device*1, adjustable finger power device*1, 50-pound finger grip ring*1, 53 semi-solid ball 550g*2

Three-piece set A: Eight-hole finger power device*1, adjustable finger power device*1, 6-pound finger grip ring*1
Three-piece B: Eight-hole finger power device*1, adjustable finger power device*1, 20-pound finger grip ring*1
Three-piece set C: Eight-hole finger power device*1, adjustable finger power device*1, 30-pound finger grip ring*1
Three-piece D: Eight-hole finger power device*1, adjustable finger power device*1, 50-pound finger grip ring*1

Single 8-hole finger trainer*1, storage bag*1

Packing list:
Trainer *1