This spring is compatible with Suffolk Punch, compatible with Atco scarifier cassette unit 14 electric/petrol, 17 petrol, 20 petrol. Also compatible with Qualcast Lawn Rake Kit Concorde RE25X 1986 to 1988, RE30DL Series H, RE30S Series J ON, RE30X 1986 to 1988, RE35DL Series H, RE35S Series J ON, RE35X 1986 to 1988 etc. The spring wire diameter is 1.2 mm, the inner diameter of the spring spiral 12.5 mm and the width is 25 mm. It is made of wear-resistant and bend-resistant 304 stainless steel to ensure long-term use. The elastic design can effectively improve the efficiency of loosening and weeding lawn mowers or grass trimmers while reducing damage to the lawn. Each set contains 10 springs to meet your usage requirements., Manufacturer: ECSiNG