A long narrow slot in a computer into which an expansion card can be inserted.
Lenovo 4XH1V39877 slot expander

Lenovo 4XH1V39877 slot expander

Lenovo
£23.99
HPE ProLiant DL360 Gen11 x16 LP Riser Kit

HPE ProLiant DL360 Gen11 x16 LP Riser Kit

Hewlett Packard Enterprise
£160.99
DELL 540-BDCG slot expander

DELL 540-BDCG slot expander

DELL
£80.99
HPE ProLiant Compute DL340 Gen12 Rear Captive Riser Kit

HPE ProLiant Compute DL340 Gen12 Rear Captive Riser Kit

Hewlett Packard Enterprise
£514.99
HPE ProLiant Compute DL360 Gen11/Gen12 x16 Primary Riser Kit

HPE ProLiant Compute DL360 Gen11/Gen12 x16 Primary Riser Kit

Hewlett Packard Enterprise
£170.99
HPE ProLiant Compute DL325 Gen12 x16 Low Profile Slot 1 Riser Kit

HPE ProLiant Compute DL325 Gen12 x16 Low Profile Slot 1 Riser Kit

Hewlett Packard Enterprise
£460.99
HPE DL38X Gen10 2 x8 PCIe Tertiary Riser Kit

HPE DL38X Gen10 2 x8 PCIe Tertiary Riser Kit

Hewlett Packard Enterprise
£197.99
HPE ProLiant Compute DL380 Gen12 2U x8/x16 Tertiary Riser Kit

HPE ProLiant Compute DL380 Gen12 2U x8/x16 Tertiary Riser Kit

Hewlett Packard Enterprise
£463.99
HPE ProLiant Compute ML350 Gen12 2x8 Tertiary Riser Kit

HPE ProLiant Compute ML350 Gen12 2x8 Tertiary Riser Kit

Hewlett Packard Enterprise
£260.99
HPE ProLiant Compute DL320 Gen12 x16 Low Profile NS204i-t Boot Controller Riser Kit

HPE ProLiant Compute DL320 Gen12 x16 Low Profile NS204i-t Boot Controller Riser Kit

Hewlett Packard Enterprise
£291.99
HPE Alletra Storage Server 4210 x16 LP Riser Kit

HPE Alletra Storage Server 4210 x16 LP Riser Kit

Hewlett Packard Enterprise
£412.99
HPE ProLiant Compute DL580 Gen12 2x16 Riser Kit

HPE ProLiant Compute DL580 Gen12 2x16 Riser Kit

Hewlett Packard Enterprise
£161.99