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 1.2mm, the inner diameter of the spring coil is 12.5mm, and the width is 25mm. It is made of 304 stainless steel material, which is wear-resistant and anti-bending to ensure long-term use. The elastic design can effectively improve the efficiency of loosening and weeding of lawn mowers or lawn trimmers, while reducing damage to the lawn. Each set contains 10 springs to meet your usage needs., Manufacturer: ECSiNG