Functions: ABS engineering plastic carbon spring steel wire tension is full and thick buckle. Specification: Material: ABS Engineering Plastic Carbon Spring Color: Black Red Product Dimensions: (Dual-purpose tensioner) 650*110*30mm/25.6*4.3*1.2in, (Triple-purpose tensioner) 680*340*30mm/26.8*13.4*1.2in Net weight: (Dual-purpose tensioner) 760g, (Triple-purpose tensioner) 1100g Gross w... https://foxybeauty.co.za/products/muti-functional-spring-chest-developer