DetailsSpecial offer price £25.99 The contents of the kit are as follows: 10 x Large leather cup washers. 10 x Small leather cup Washers. 4 x NRV Valve,s. 4 x Brass Jets Nipples. 10 x Fibre Washers. 4 x Prickers. 4 x Filler Cap Washers. 2 x Silent burner inner caps. 2 x Silent Flame spreaders.