What type of fiber cable is required for this transceiver?

This transceiver requires a single mode fiber cable.

What is the maximum distance this SFP transceiver can cover?

The maximum distance this SFP transceiver can cover is 10 km (6.2 miles).

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StarTech.com Juniper EX-SFP-1GE-LX Compatible SFP Module - 1000BASE-LX - 1GE SFP 1GbE Single Mode Fiber SMF Optic Transceiver 10km DDM

100% JUNIPER EX-SFP-1GE-LX COMPATIBLE SFP TRANSCEIVER: Designed, programmed and tested to work with compatible Juniper switches and routers to deliver dependable 1GbE connectivity
TECHNICAL SPECS: 1000BASE-LX | 1Gbps | Single Mode (SMF) | LC Connector | 1310nm | Digital Diagnostic Monitoring (DDM) | Distances up to 10km (6.2mi)
TESTED FOR OEM HOST COMPATIBILITY: Hot-swappable in Juniper routers and switches; DDM support reports the transceiver's status to most SNMP network management tools
LIFETIME WARRANTY: Backed by a lifetime warranty on the life of the module itself - not the life of your switch. Our modules won't void your OEM warranty and supported by our Tech Advisors 5/24.
WORKS WITH MSA COMPLIANT SWITCHES: Also works with switch models from Ubiquiti, D-Link, Netgear, Supermicro, TP-Link and more that accept uncoded modules