WA0037 Replacement Spool Cap Cover for Worx WG184, WG190, WG191, WG168 automatic feed string trimmers. WA0037 Spool Cap, Grass Trimmer Spool Cap Cover for WORX made of high quality ABS, durable for use. WA0037 Replacement Spool cap for WORX protects trimmer line fixed spool, prevents weeds from getting stuck inside, avoids damage to the trimmer. WA0037 replacement grass trimmer spool cap cover is for use on 40-volt models WG168 weed and grass trimmers, WG184 weed eater parts, WG190 string trimmer parts. WA0037 Replacement Cap works with WA0014 Trimmer Spool for Worx replacement parts. Easy to install, no tools needed, snaps in place over spool line. Color: Black. Material: ABS. Package Contents: 4 x WA0037 replacement spool cap. Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture to be slightly different from the real thing. Measurement allowed error is +/- 1-3 cm.