WA0037 Replacement Spool Cap Cover for WG184, WG190, WG191, WG168 automatic feed string trimmers. WA0037 Spool Cap, Grass Trimmer Spool Cap Cover made of high quality ABS, durable for use. WA0037 Replacement Spool Cap protects trimmer line fixed spool, prevents weeds from getting stuck inside, helps avoid damage to the trimmer. WA0037 Replacement grass trimmer spool cap cover is compatible with 40-volt models WG168, WG184, WG190 string trimmer parts. WA0037 Replacement Cap works with WA0014 Trimmer Spool as a replacement part. Easy to install, no tools required, snaps into place over spool line. Color: Black Material: ABS Package Contents: 4 x WA0037 Replacement Spool Cap Only the above package content is included; other products are not included. Note: Light and display differences may cause slight color variation between the item and the image. Measurement may vary by +/- 1-3 cm.